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Caolco

  • 3 years ago

Is this answer correct? The point P(18, 24) is on the terminal side of θ. Evaluate sin θ. =4/3

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  1. swissgirl
    • 3 years ago
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    hmm what does it mean to be on the terminal side of theta?

  2. Caolco
    • 3 years ago
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    Oh I see. Thanks for the diagram. So it is 4/3

  3. swissgirl
    • 3 years ago
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    nope i had to switch it cuz i cldnt evaluate 4/3 only 3/4

  4. swissgirl
    • 3 years ago
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    smth is wrong hmmmm i must have drawn the pic incorrectly

  5. Caolco
    • 3 years ago
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    well the possible answers are 4/5 4/3 3/5 3/4

  6. Caolco
    • 3 years ago
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    and I evaluated with 24/18 and just simplified the answer to 4/3. Is that wrong?

  7. swissgirl
    • 3 years ago
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    ohhh i see my mess up sin is opposite over hypotnuse |dw:1350264991894:dw|

  8. swissgirl
    • 3 years ago
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    \( r^2=18^2+24^2\) \( r^2=900\) \(r=30\)

  9. swissgirl
    • 3 years ago
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    \( sin( \theta) = \large \frac {24}{30}=\frac {4} {5}\)

  10. swissgirl
    • 3 years ago
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    by the way r=hypotnuse

  11. swissgirl
    • 3 years ago
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    \(Sin( \theta)= \frac{opposite}{hypoynuse}\)

  12. Caolco
    • 3 years ago
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    So the answer is 4/5? Damn, I was way off.

  13. swissgirl
    • 3 years ago
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    well we forgot about the hypotnuse lol

  14. Caolco
    • 3 years ago
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    makes sense. :P Thanks for catching that.

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